Mr Assange's lawyers said that if he was sent to Sweden he would be at risk of then being extradited to the US, where he faces espionage charges.

Because Mr Assange, who is Australian, was living in the UK at the time of the arrest warrant over the allegations, officials in the UK would be able to deport him to Sweden should he step foot outside of the building.

Since being granted asylum at the Ecuadorian embassy in Knightsbridge, Mr Assange has made rare appearances to the public - either from his balcony or via virtual TV spots.

In December 2012, two months into his refuge, Mr Assange appeared on the embassy’s balcony to thank his supporters, calling on US president Barack Obama to stop the 'witch-hunt' against WikiLeaks

The next year in August 2013, Mr Assange sang a WikiLeaks-inspired tribute to Australian rock singer John Farnham's hit You're the Voice in an Australian satirical show ahead of the country's election.

What other key appearances has Mr Assange made while holed-up in the embassy? Watch the video to find out.